What Makes a Windshield Crack Worse

Your car’s windshield plays a crucial role in ensuring your safety on the road. However, it is not immune to damage, and when a crack appears, understanding the factors that can make it worse is essential. In this blog post, we will delve into the various elements that contribute to the deterioration of a windshield crack and what you can do to mitigate the damage.

Temperature Fluctuations

Windshield cracks are susceptible to temperature changes. When exposed to extreme temperatures, especially rapid shifts from hot to cold or vice versa, the materials in the windshield expand and contract. This constant movement can cause the crack to spread.

Direct Sunlight

Prolonged exposure to direct sunlight can exacerbate a windshield crack. The heat absorbed by the glass can intensify the stress on the already compromised area, leading to further expansion.

Driving Vibrations

Every bump and vibration you encounter while driving can impact a cracked windshield. The constant movement of the vehicle puts stress on the glass, potentially causing the crack to extend. Avoiding rough roads or potholes can help minimize these vibrations.

Dirt and Debris

Dust, dirt, and debris that accumulate in the crack can worsen the situation. These particles can act like sandpaper, gradually wearing down the edges of the crack and making it more susceptible to spreading.

Moisture and Rain

Water can seep into a crack and weaken the structural integrity of the glass. Additionally, if the temperature drops and the water freezes, it can expand and put pressure on the crack, causing it to grow.

Delay in Repairs

Ignoring a windshield crack and delaying repairs is a common mistake. What may start as a small, manageable crack can quickly turn into a larger, more complex issue if left unaddressed. It’s crucial to address cracks promptly to prevent further damage.

Type and Location of the Crack

The type and location of the crack also play a role in how it may progress. For example, a crack near the edge of the windshield is more likely to spread quickly than one in the center. Similarly, a long crack is generally more prone to worsening than a small chip.

Quality of Repair Materials

If you opt for a DIY repair or choose a subpar service, the quality of the materials used can impact the effectiveness of the fix. Professional repairs using high-quality materials are essential for ensuring the longevity of the windshield.


In conclusion, understanding the factors that contribute to the worsening of a windshield crack is crucial for taking proactive measures. Regular inspections, prompt repairs, and avoiding factors that exacerbate the damage can help preserve the integrity of your windshield and, ultimately, enhance your safety on the road. Don’t let a small crack turn into a major issue; address it promptly and ensure the longevity of your vehicle’s most important safety feature. Call Defender Auto Glass and nip windshield cracks in the bud.